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APPLICATION FILED SEPT. 9, 1007. 993,200. Patented May 23,1911.

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F. P. RUDDER.

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APPLICATION FILED SEPT. 9, 1907. 993,200. Patented May 23, 1911.

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FRANK PERCY RUDDER, 0F DERBY, ENGLAND.

FURNACE.

Specification of Letters Patent.

Patented May 23, 1911.

Application 1ed September 9, 1907. Serial No. 392,038.

To all whom 'it may concern:

Be it known that I, FRANK Pliner RUD- DER, British subject, and residing at Derby, in the county of Derby, England, have invented certain new and useful Improvements in Furnaces, of which the following is a specification.

This invention relates to furnaces of all descriptions and for all purposes in which it may be advantageous to remove the grate, sole or table of the furnace for any purpose such as charging or discharging and clearing out the clinker or to insert therein or withdraw therefrom a billet or ingot, or for any other purpose in which it may be found advantageous to so remove the grate or a portion thereof.

The invention consists essentially in means for raising and lowering the grate, sole or table consisting of a tank or tanks constructed underneath the furnace or furnaces in which are arranged one or more floats or pontoons which carry the grate and which are adapted to be raised and lowered by raising or lowering the level of the water in the tank after the manner of an ordinary ock.

The invention will be fully described with reference to the accompanying drawings in which the invention is shown as applied to a refuse destructor.

Figure 1 is a transverse section through the center of a cell of a furnace or refuse n destructor. Fig. 2 is a section of a furnace or refuse destructor embodying the invention and showing a slight modification in the air supplying means. Fig. 3 is a transverse section through the furnace or refuse destructor showing a further modified form of the invention. Fig. 4 is a view similar to Fig. 3 showing a further modification. Fig. 5 is a longitudinal section through the furnace or destructor showing a pontoon in raised position and arranged to carry the grates of a complete unit of furnaces. Fig. 6 is a view similar to Fig. 5 showing a pon'- toon and grates in lowered'position.

In the simplest form of the invention (see Figs. l and 2) in which it is adapted merely to a rising and falling grate, a tank B is constructed under the furnace A of suitable 'completely inclosed chamber open only to Or (as shown in Figs. 3 and t) a side inlet or inlets F arranged to connect with corresponding air supply ipes G when the pontoon is in the ralsec position may be employed. In this case guides (not shown) arranged externally may be employed to maintain the pontoon in the correct position as it rises and falls.

Vater to float the pontoon may be provided from any convenient source or a supply or compensating tank arranged conveniently above the pontoon tank and supplied from a towns or any other supply may be used. When the pontoon is to be lowered the water may be allowed to flow away through a sluice or valve or may be pumped back to the compensating or supply tank. The level of water in the tank is preferably maintained at such a height as to cause a certain amount of upward pressure to be eX- erted on the grate to cause it to bed tightly against its seating in the furnace structure.

Means may be provided for completely emptying the tank and one side b of the tank (see Fig. 1) may be made removable to permit of the inspection and removal or renewal of the pontoon C and grate D. Means may also be provided for retaining the grate or pontoon and grate in either the upper or lower position.

Suitable means for charging or discharging and clearing the grate of clinker when in the lowered position may also be provided and will preferably be in the form of a ram, as shown.

Instead of a simple up and down movement being given to the pontoon C and grate D it may be so arranged that as it descends one side engages a projection or the like I-I which supports it so that as it continues to descend an inclination is given to the surface of the grate D to enable anything thereon to be easily removed therefrom. Where a number of furnace cells are arranged side by side see Figs. 5 and 6 one tank ,I3 and float or pontoon C may be employed to support the grates D of any number or all of the cells, l

or the tank and pontoons may be made in as many divisions or'parts 'as desired.

I An inclined support l/V is provided adacent the upper portion of the tank, as particularly shown by Figs.- l, 3 and 4, and at an oppositepoint a ram or pushing means is illustrated. The inclined support and the ram or pushing means facilitate the discharge Vof the grate or of the material on the latter desired to be removed.

What I claim as my invention and desire to protect by Letters Patent is 1. The combination of a furnace and its grate, the latter being movable into and out of operativ-e position, a pontoon with which said grate engages and is removably associated, means for floating said pontoon and holding the upper end thereof normally in elevated position, and tubular means for supplying air upwardly through the Vfloating portion'of the body of the pontoon.

2. The combination of a furnace and its grate, the grate being movable into and out of operative position, a chambered pontoon having a fixed top portion with which the said grate is directly and operatively associated, means for floating and holding the pontoon in operative position, the pontoon bein movable solely upwardly and downwarly, and tubular means entering the lower portion of the pontoon and extending partially upwardly through said pontoon for supplying air to the grate.

3. The combination of a furnace and its grate, the latter being movable into and out of operative position, a pontoon with which said grate is operatively associated, means for floating the pontoon, and tubular means extending into and partially upwardly through the pontoon for supplying air to the grat-e, the pontoon being vertically movable and a portion of the tubular means extending into the same having its communication maintained with the interior ofthe pontoon during the movement of the latter.

4. The combination of a furnace grate movable into and out of operative position, a liquid containing tank under ythe grate, a grate carrying pontoon loosely applied in the tank and movable solely upwardly and downwardly in said tank, the grate resting on the upper portion of the pontoon both when the latter is elevated relatively to the furnace and when lowered to discharge the material from the grate, means adjacent to theupper portion of the tank for facilitating the discharge of material from the grate when lowered, and tubular means extending partially through the pontoon for supplying lair to the under side of the grate.

5. The vcombination of a furnace grate, a pontoon carrying the said grate and having a rising and falling movement, means to maintain a body of liquid for floating said pontoon, means for supplying air over the upper portion of the grate when the latter is elevated, and tubular means extending partially through the pontoon for supplying air to the under side of the grate.

6. The combination of a furnace and its grate, the grate being mounted for rising and falling movement, relatively to its operative position, hydraulic means for raising and lowering` the grate, and an air pipe extending into and through a portion of the hydraulic means and furnishing an air supply for the grate.

7. The combination of a furnace and its grate, the grate having ascending and descending movements relatively to its operative position, a pontoon on which the grate is removably disposed, .and an air supply pipe having a portion extending exteriorly of the furnace and a portion extending into and upwardly through a part of the pontoon and terminating adjacent to the under side of the grate for supplying air to the furnace.

8. The lcombination of a furnace and its grate, the latter being mounted for descending land ascending movement relatively to its operative position, an air supply pipe comprising sections separably connected, one of said pipe sections being separable from the other on the descent of said grate, a grate carrying pontoon with which the 'air supply pipe coperates, and means to contain liquid for floating said pontoon. y

9. The combination of a furnace and its grate, the latter being movable into and out of operative position, a chambered pontoon for carrying said grate, a liquid containing tank for ioating the pontoon,.the pontoon and grate being depressed when the level of the liquid in the tank is'lowered, and an air supply means extending into and upwardly through a portion of the pontoon and preserved in communication with the interior of the latter during movement of said pontoon.

10.y The combinationiof a furnace and its grate, the latter being mounted for rising and falling movements to dispose the grate in or out of operative position, a pontoon for carrying said grate, and a tubular air supply means extending into and upwardly through a portion of the pontoon and `maintained in commiuiication with the interior of the latter during movement of the pontoon, the tubular air supply means'having a portion thereof exterior of the part of the furnace in which the grate and pontoon have operation.

11. The combination of a furnace and its grate, the latter having ascending and descending movements relative to its operative position, a pontoon for carrying said grate and on which the latter is directly ksupportt-ermediate diaphragm therein for` preventing `ashes and other residuum from fallin In witness whereof, I have hereunto into a portion of the pontoon below sai signed my name in the presence of two sub- 10 diaphragm, tubular air supply means exscribing witnesses.

tending partially through the pontoon and the diaphragm, and means for floating said FRANK PERCY RUDDER' pontoon and causing it to rise and fall rela- Witnesses:

tively to the operatlve position of the grate I. OWDEN OBRmN,

in the furnace. l HARRY BARNFATHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. C. 

